package org.xdq.观察者模式;

public class Customer implements Observer {

    @Override
    public void update(Object arg) {
        int priceVar = (Integer)arg;
        if(priceVar > 0){
            System.out.println("消费者：东西又贵了，不买了！");
        }else if(priceVar < 0){
            System.out.println("消费者：降价了，多买点！");
        }
    }
}
